Comrie also had an assist as the Islanders finished 2-1-and-2 on a five-game winning streak that ended with back-to-back wins at Calgary and Ottawa.
Daniel Alfredsson had a power-play goal for the Senators, who finished the game without Jason Spezza. A team spokesman said Spezza was held out for precautionary reasons after he was flattened by Freddy Mayer on an open-ice hit.